cricket
during college, had a class on an IBM system(might have been a 36)
the keys of the terminals "clicked" using a buzzer. the terminal bell(control-g) used a longer duration "click" that sounded like a cricket.
Wrote a program, cricket, that simulated the logon screen. It would wait until the next hour began(ie: minutes=0) then randomly control-g based on how many minutes into the hour the time was.
The beginning programming class after mine hadn't started using the terminals yet(still in lectures). Started up cricket on all the terminals before that class began.
